Two sad sick plants need some help

Howdy,

I've got five plants in a 3x3 tent right now for my first indoor grow. I've grown outside a couple times before with great success as well. As it stands, 2 of my 5 plants are having some issues. Plant One is stunted and yellowed with slow growth. The other (plant two) has curled leaves, is darker colored, and generally more knotted and twisty/stumpy looking.

So here's some pictures of plant #1:







And plant #2:



And one of the healthy sisters, for comparison:



These guys are at days 32 from seed, I've fed them three times now with compost tea made with compost from my garden, as well as insect frass, liquid kelp, and fish hydrolysate. I'm going to feed again with a compost tea this week since it's been about two weeks.

I don't think there should be any serious nutrient feeding discrepancies. Each plant has received the same feeding, and they're all in the same batch of soil which was well mixed (although I think part of my problem was not allowing the soil to cook properly, it only really sat stewing in a dark place for a few days which is definitely something I will be doing differently next time).

The lights have been about 12 inches away from the tops of the plants, I moved them 12 inches higher today. The light intensity is greater at the center, where I have recently move the more stunted plant #1. I'm running the 280 watt mars 600, and 220 watts of ebay COBs to fill in the corners. Here's what the light looks like:



What do you guys think may be the problem here (if there is only one problem)?

Cheers!

- fix the following problems and many deficiencies will go away...
Overwatering & underwatering
High humidity
Uneven moisture levels in the soil or growing medium
Too-high levels of N-P-K nutrients
PH is too high or low

Thanks for the info Tupapa. Overwatering was one of my biggest theories for plant #2. Humidity isn't an issue at a constant 50-60 RH I think, but correct me if I'm wrong. Moisture should generally be fairly even, I water once every couple days for about 20-30% runoff which is then reabsorbed through the bottom of the pots.

PH is unknown, what's a good way of testing PH when I'm using soil?

If I do find pH issues, what would I be able to to do about it? Why would 3 other plants be ok for pH in the same soil with the same water, while one or two of them are locked out? Not super clear on all that, I definitely need to do some reading here.

The only NPK nutrients I'm using are insect frass, and a small amount of liquid kelp.

Looks over watered to me., Also ri

shadow_moose said:

Thanks for the info Tupapa. Overwatering was one of my biggest theories for plant #2. Humidity isn't an issue at a constant 50-60 RH I think, but correct me if I'm wrong. Moisture should generally be fairly even, I water once every couple days for about 20-30% runoff which is then reabsorbed through the bottom of the pots.

PH is unknown, what's a good way of testing PH when I'm using soil?

If I do find pH issues, what would I be able to to do about it? Why would 3 other plants be ok for pH in the same soil with the same water, while one or two of them are locked out? Not super clear on all that, I definitely need to do some reading here.

The only NPK nutrients I'm using are insect frass, and a small amount of liquid kelp.

Click to expand...

First of all all plants are different and reacts differently., Second to measure ph in soil u need a good digital ph pen u can find really good ones at ebay., And cannabis best ph ranges for intake of nutrients is between 6-7 also don't let ur plants sit on run off water vacuum suck runoff and dont let it be reabsorbed., I think thats ur main problem and not knowing ur ph. GL